Radiation pressure on randomly oriented infinite cylinders

Ariel Cohen, Pinhas Alpert

Research output: Contribution to journalArticlepeer-review


Expressions are developed for the radiation pressure on infinite dielectric cylinders caused by an oblique incidence as a function of the size parameter a = 27ra/X. It is shown that for nonabsorbing cylinders the radiation pressure is always perpendicular to the axis of the cylinder and thus not along the direction of the incident radiation except for the case of normal incidence. This result applies also for other small nonspherical particles. Consequently, the radiation pressure on a randomly oriented nonspinning group of small nonspherical particles causes the particles to spread away from the direction of propagation of the incident radiation. It is suggested that this conclusion should be taken into account when discussing the effect of the radiation pressure on small particles in space, as compared with other forces such as the dynamic pressure on the solar wind.

Original languageEnglish
Pages (from-to)558-560
Number of pages3
JournalApplied Optics
Issue number4
StatePublished - 15 Feb 1980
Externally publishedYes


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